570 lines
15 KiB
C
570 lines
15 KiB
C
/* ssl/s2_lib.c */
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
|
* All rights reserved.
|
|
*
|
|
* This package is an SSL implementation written
|
|
* by Eric Young (eay@cryptsoft.com).
|
|
* The implementation was written so as to conform with Netscapes SSL.
|
|
*
|
|
* This library is free for commercial and non-commercial use as long as
|
|
* the following conditions are aheared to. The following conditions
|
|
* apply to all code found in this distribution, be it the RC4, RSA,
|
|
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
|
|
* included with this distribution is covered by the same copyright terms
|
|
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
|
|
*
|
|
* Copyright remains Eric Young's, and as such any Copyright notices in
|
|
* the code are not to be removed.
|
|
* If this package is used in a product, Eric Young should be given attribution
|
|
* as the author of the parts of the library used.
|
|
* This can be in the form of a textual message at program startup or
|
|
* in documentation (online or textual) provided with the package.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* "This product includes cryptographic software written by
|
|
* Eric Young (eay@cryptsoft.com)"
|
|
* The word 'cryptographic' can be left out if the rouines from the library
|
|
* being used are not cryptographic related :-).
|
|
* 4. If you include any Windows specific code (or a derivative thereof) from
|
|
* the apps directory (application code) you must include an acknowledgement:
|
|
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* The licence and distribution terms for any publically available version or
|
|
* derivative of this code cannot be changed. i.e. this code cannot simply be
|
|
* copied and put under another distribution licence
|
|
* [including the GNU Public Licence.]
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* openssl-core@openssl.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include "ssl_locl.h"
|
|
#ifndef OPENSSL_NO_SSL2
|
|
# include <stdio.h>
|
|
# include <openssl/objects.h>
|
|
# include <openssl/evp.h>
|
|
# include <openssl/md5.h>
|
|
|
|
const char ssl2_version_str[] = "SSLv2" OPENSSL_VERSION_PTEXT;
|
|
|
|
# define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))
|
|
|
|
/* list of available SSLv2 ciphers (sorted by id) */
|
|
OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[] = {
|
|
# if 0
|
|
/* NULL_WITH_MD5 v3 */
|
|
{
|
|
1,
|
|
SSL2_TXT_NULL_WITH_MD5,
|
|
SSL2_CK_NULL_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_eNULL,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_EXPORT | SSL_EXP40 | SSL_STRONG_NONE,
|
|
0,
|
|
0,
|
|
0,
|
|
},
|
|
# endif
|
|
|
|
/* RC4_128_WITH_MD5 */
|
|
{
|
|
1,
|
|
SSL2_TXT_RC4_128_WITH_MD5,
|
|
SSL2_CK_RC4_128_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_RC4,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM,
|
|
0,
|
|
128,
|
|
128,
|
|
},
|
|
|
|
# if 0
|
|
/* RC4_128_EXPORT40_WITH_MD5 */
|
|
{
|
|
1,
|
|
SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
|
|
SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_RC4,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_NOT_DEFAULT | SSL_EXPORT | SSL_EXP40,
|
|
SSL2_CF_5_BYTE_ENC,
|
|
40,
|
|
128,
|
|
},
|
|
# endif
|
|
|
|
/* RC2_128_CBC_WITH_MD5 */
|
|
{
|
|
1,
|
|
SSL2_TXT_RC2_128_CBC_WITH_MD5,
|
|
SSL2_CK_RC2_128_CBC_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_RC2,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM,
|
|
0,
|
|
128,
|
|
128,
|
|
},
|
|
|
|
# if 0
|
|
/* RC2_128_CBC_EXPORT40_WITH_MD5 */
|
|
{
|
|
1,
|
|
SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
|
|
SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_RC2,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_NOT_DEFAULT | SSL_EXPORT | SSL_EXP40,
|
|
SSL2_CF_5_BYTE_ENC,
|
|
40,
|
|
128,
|
|
},
|
|
# endif
|
|
|
|
# ifndef OPENSSL_NO_IDEA
|
|
/* IDEA_128_CBC_WITH_MD5 */
|
|
{
|
|
1,
|
|
SSL2_TXT_IDEA_128_CBC_WITH_MD5,
|
|
SSL2_CK_IDEA_128_CBC_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_IDEA,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM,
|
|
0,
|
|
128,
|
|
128,
|
|
},
|
|
# endif
|
|
|
|
# if 0
|
|
/* DES_64_CBC_WITH_MD5 */
|
|
{
|
|
1,
|
|
SSL2_TXT_DES_64_CBC_WITH_MD5,
|
|
SSL2_CK_DES_64_CBC_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_DES,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_LOW,
|
|
0,
|
|
56,
|
|
56,
|
|
},
|
|
# endif
|
|
|
|
/* DES_192_EDE3_CBC_WITH_MD5 */
|
|
{
|
|
1,
|
|
SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
|
|
SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_3DES,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_HIGH,
|
|
0,
|
|
112,
|
|
168,
|
|
},
|
|
|
|
# if 0
|
|
/* RC4_64_WITH_MD5 */
|
|
{
|
|
1,
|
|
SSL2_TXT_RC4_64_WITH_MD5,
|
|
SSL2_CK_RC4_64_WITH_MD5,
|
|
SSL_kRSA,
|
|
SSL_aRSA,
|
|
SSL_RC4,
|
|
SSL_MD5,
|
|
SSL_SSLV2,
|
|
SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_LOW,
|
|
SSL2_CF_8_BYTE_ENC,
|
|
64,
|
|
64,
|
|
},
|
|
# endif
|
|
|
|
# if 0
|
|
/* NULL SSLeay (testing) */
|
|
{
|
|
0,
|
|
SSL2_TXT_NULL,
|
|
SSL2_CK_NULL,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
SSL_SSLV2,
|
|
SSL_STRONG_NONE,
|
|
0,
|
|
0,
|
|
0,
|
|
},
|
|
# endif
|
|
|
|
/* end of list :-) */
|
|
};
|
|
|
|
long ssl2_default_timeout(void)
|
|
{
|
|
return (300);
|
|
}
|
|
|
|
int ssl2_num_ciphers(void)
|
|
{
|
|
return (SSL2_NUM_CIPHERS);
|
|
}
|
|
|
|
const SSL_CIPHER *ssl2_get_cipher(unsigned int u)
|
|
{
|
|
if (u < SSL2_NUM_CIPHERS)
|
|
return (&(ssl2_ciphers[SSL2_NUM_CIPHERS - 1 - u]));
|
|
else
|
|
return (NULL);
|
|
}
|
|
|
|
int ssl2_pending(const SSL *s)
|
|
{
|
|
return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
|
|
}
|
|
|
|
int ssl2_new(SSL *s)
|
|
{
|
|
SSL2_STATE *s2;
|
|
|
|
if ((s2 = OPENSSL_malloc(sizeof *s2)) == NULL)
|
|
goto err;
|
|
memset(s2, 0, sizeof *s2);
|
|
|
|
# if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
|
|
# error "assertion failed"
|
|
# endif
|
|
|
|
if ((s2->rbuf =
|
|
OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2)) == NULL)
|
|
goto err;
|
|
/*
|
|
* wbuf needs one byte more because when using two-byte headers, we leave
|
|
* the first byte unused in do_ssl_write (s2_pkt.c)
|
|
*/
|
|
if ((s2->wbuf =
|
|
OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 3)) == NULL)
|
|
goto err;
|
|
s->s2 = s2;
|
|
|
|
ssl2_clear(s);
|
|
return (1);
|
|
err:
|
|
if (s2 != NULL) {
|
|
if (s2->wbuf != NULL)
|
|
OPENSSL_free(s2->wbuf);
|
|
if (s2->rbuf != NULL)
|
|
OPENSSL_free(s2->rbuf);
|
|
OPENSSL_free(s2);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
void ssl2_free(SSL *s)
|
|
{
|
|
SSL2_STATE *s2;
|
|
|
|
if (s == NULL)
|
|
return;
|
|
|
|
s2 = s->s2;
|
|
if (s2->rbuf != NULL)
|
|
OPENSSL_free(s2->rbuf);
|
|
if (s2->wbuf != NULL)
|
|
OPENSSL_free(s2->wbuf);
|
|
OPENSSL_cleanse(s2, sizeof *s2);
|
|
OPENSSL_free(s2);
|
|
s->s2 = NULL;
|
|
}
|
|
|
|
void ssl2_clear(SSL *s)
|
|
{
|
|
SSL2_STATE *s2;
|
|
unsigned char *rbuf, *wbuf;
|
|
|
|
s2 = s->s2;
|
|
|
|
rbuf = s2->rbuf;
|
|
wbuf = s2->wbuf;
|
|
|
|
memset(s2, 0, sizeof *s2);
|
|
|
|
s2->rbuf = rbuf;
|
|
s2->wbuf = wbuf;
|
|
s2->clear_text = 1;
|
|
s->packet = s2->rbuf;
|
|
s->version = SSL2_VERSION;
|
|
s->packet_length = 0;
|
|
}
|
|
|
|
long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (cmd) {
|
|
case SSL_CTRL_GET_SESSION_REUSED:
|
|
ret = s->hit;
|
|
break;
|
|
case SSL_CTRL_CHECK_PROTO_VERSION:
|
|
return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg);
|
|
default:
|
|
break;
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This function needs to check if the ciphers required are actually
|
|
* available
|
|
*/
|
|
const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
|
|
{
|
|
SSL_CIPHER c;
|
|
const SSL_CIPHER *cp;
|
|
unsigned long id;
|
|
|
|
id = 0x02000000L | ((unsigned long)p[0] << 16L) |
|
|
((unsigned long)p[1] << 8L) | (unsigned long)p[2];
|
|
c.id = id;
|
|
cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
|
|
return cp;
|
|
}
|
|
|
|
int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
|
|
{
|
|
long l;
|
|
|
|
if (p != NULL) {
|
|
l = c->id;
|
|
if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV)
|
|
return (0);
|
|
p[0] = ((unsigned char)(l >> 16L)) & 0xFF;
|
|
p[1] = ((unsigned char)(l >> 8L)) & 0xFF;
|
|
p[2] = ((unsigned char)(l)) & 0xFF;
|
|
}
|
|
return (3);
|
|
}
|
|
|
|
int ssl2_generate_key_material(SSL *s)
|
|
{
|
|
unsigned int i;
|
|
EVP_MD_CTX ctx;
|
|
unsigned char *km;
|
|
unsigned char c = '0';
|
|
const EVP_MD *md5;
|
|
int md_size;
|
|
|
|
md5 = EVP_md5();
|
|
|
|
# ifdef CHARSET_EBCDIC
|
|
c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0', see
|
|
* SSLv2 docu */
|
|
# endif
|
|
EVP_MD_CTX_init(&ctx);
|
|
km = s->s2->key_material;
|
|
|
|
if (s->session->master_key_length < 0 ||
|
|
s->session->master_key_length > (int)sizeof(s->session->master_key)) {
|
|
SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
md_size = EVP_MD_size(md5);
|
|
if (md_size < 0)
|
|
return 0;
|
|
for (i = 0; i < s->s2->key_material_length; i += md_size) {
|
|
if (((km - s->s2->key_material) + md_size) >
|
|
(int)sizeof(s->s2->key_material)) {
|
|
/*
|
|
* EVP_DigestFinal_ex() below would write beyond buffer
|
|
*/
|
|
SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
EVP_DigestInit_ex(&ctx, md5, NULL);
|
|
|
|
OPENSSL_assert(s->session->master_key_length >= 0
|
|
&& s->session->master_key_length
|
|
<= (int)sizeof(s->session->master_key));
|
|
EVP_DigestUpdate(&ctx, s->session->master_key,
|
|
s->session->master_key_length);
|
|
EVP_DigestUpdate(&ctx, &c, 1);
|
|
c++;
|
|
EVP_DigestUpdate(&ctx, s->s2->challenge, s->s2->challenge_length);
|
|
EVP_DigestUpdate(&ctx, s->s2->conn_id, s->s2->conn_id_length);
|
|
EVP_DigestFinal_ex(&ctx, km, NULL);
|
|
km += md_size;
|
|
}
|
|
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
return 1;
|
|
}
|
|
|
|
void ssl2_return_error(SSL *s, int err)
|
|
{
|
|
if (!s->error) {
|
|
s->error = 3;
|
|
s->error_code = err;
|
|
|
|
ssl2_write_error(s);
|
|
}
|
|
}
|
|
|
|
void ssl2_write_error(SSL *s)
|
|
{
|
|
unsigned char buf[3];
|
|
int i, error;
|
|
|
|
buf[0] = SSL2_MT_ERROR;
|
|
buf[1] = (s->error_code >> 8) & 0xff;
|
|
buf[2] = (s->error_code) & 0xff;
|
|
|
|
/* state=s->rwstate;*/
|
|
|
|
error = s->error; /* number of bytes left to write */
|
|
s->error = 0;
|
|
OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
|
|
i = ssl2_write(s, &(buf[3 - error]), error);
|
|
|
|
/* if (i == error) s->rwstate=state; */
|
|
|
|
if (i < 0)
|
|
s->error = error;
|
|
else {
|
|
s->error = error - i;
|
|
|
|
if (s->error == 0)
|
|
if (s->msg_callback) {
|
|
/* ERROR */
|
|
s->msg_callback(1, s->version, 0, buf, 3, s,
|
|
s->msg_callback_arg);
|
|
}
|
|
}
|
|
}
|
|
|
|
int ssl2_shutdown(SSL *s)
|
|
{
|
|
s->shutdown = (SSL_SENT_SHUTDOWN | SSL_RECEIVED_SHUTDOWN);
|
|
return (1);
|
|
}
|
|
#else /* !OPENSSL_NO_SSL2 */
|
|
|
|
# if PEDANTIC
|
|
static void *dummy = &dummy;
|
|
# endif
|
|
|
|
#endif
|